We are used to the idea that doctrine is defined and held together by straightforward literal – almost legal – language. Historically, the teaching of scripture has been reduced to a series of propositions in a ‘statement of faith’ or a ‘creed.’ But Jesus didn’t teach like that, and the parables are an essential part of the way he encouraged his audience to think for themselves. ‘That is curious’ they might say. ‘What is this young rabbi driving at?’